Accurate spectroscopy of Sr atoms I. Courtillot, A. Quessada-Vial, A. Brusch, D. Kolker, G. D. Rovera and P. Lemonde Eur. Phys. J. D, 33 2 (2005) 161-171 Published online: 03 May 2005 DOI: 10.1140/epjd/e2005-00058-0